Saw this video
recently, take a look at this:
He was standing next to the rim as well so the angle isn't too misleading. Makes sense too - vert in the mid 30s, let's say 34 inches (Is it actually 36? Not sure) plus his 7 foot+ height = top of his head should be near rim level.
(By the way, ignore the Kobe agenda in that video, couldn't find another one of Shaq's 63 points.)