My son's college was playing Florida state a few years ago, The one LHP on FS was throwing 78 and they referred to him as a very successful pitcher. FS was ranked #1 that year.
Also there are lots of great relievers in college ball and not all want to be a starter.
Regardless of your velocity let the coaches tell you and do not rely on other people. Lots of D1 pitchers including RHPs do not throw 90+.