GBM, 84 at sea level is 84 at 4000' +. Stalkers measure velocity at near-release. The distance is immaterial. Therefore, considering the variables (including exit angle) long-toss distance does not predict mound velocity. At 84, no D1 or pro scout would be interested. Just not hard enough.
While I agree that most kids with 90 MPH velocity can throw for distance, what does it matter if the kid is throwing 90 regardless?