I don't know.
There are always outliers.
I went to two games this past weekend between two solid D1 programs (Nevada and Fresno St). There were two pitchers that scouts were paying attention to. The first was a left from Fresno St who got shelled (7 earned in 4 innings, 2 BB, 2 HBP), but, the guns were on every pitch and all the scouts were taking notes. The second was a big RHP (6' 4", 240 lbs). They were gunning him and taking notes for a couple of innings then sort of stopped. No other pitchers drew their attention other than a pitch here and there and someone writing a quick note....probably their name. The two guys that had their attention were the two hardest throwers of the weekend that pitched (a total of about 10 or 11 pitchers that I saw). The LHP was sitting 87-90, mostly working in the 88 range. The RHP was 88-91 mostly sitting 89 ish. A lot of these guys are huge guys, three of the pitchers were listed at 6' 6". None of them threw 90 however. One of the big RHPs a 6' 6" guy was working 82-84 range and was very effective. Scouts were just chit chatting while he was pitching. Even though the LHP got hammered there was a lot more interest in him than the RHP who was working in the same velo range but was effective, a 1 hitter through 5 innings.
So, yeah, I think you can play D1 ball as a RHP and be mid 80s (83-86). I saw more than half the pitchers in these two games working there. As for pro ball, that is another animal.
Despite what You Tube and Perfect Game and various other online sources would have everyone think, I believe a true hard thrower, a kid that is sitting high 80s to 90+ is still pretty rare. Those perfect game sites list their peak velo....so they list a kid at 90 when he may have been gunned there once ever. Read further down and you'll see he is sitting 86. I think the obsession with velo is because it is the quickest way to get attention, it is easy to understand and measure. As for the scouts....they will report and scout what their bosses ask for. If you're a RHP and throw 85, you better be remarkable in another way to get a pro scouts attention.