OP means original poster. And no bashing or hating on my part. Just commenting.
I'm sure someone with more experience than me will chime in eventually but I looked up a few players I know of from our region who are committed D1 Cs. They are both 2017 players (for the committed players I could find no stats for 2018 or 2019) and their arm velos were 80. 80mph in the class of 2017 is good for 93rd percentile - so pretty good. My guess is that 89 for the class of 2019 has got to be 99th percentile. But that's just a guess.
You didn't give a specific pop time but I know below 2 is where you need to be so a good starting point. Regardless - with velo like that he could always be moved to P if the catching doesn't work out.
To me that projects well. My research is not scientific though - just one guy bored on a Friday and trying to kill time until the work week is done.