In addition to what's already been said, keep in mind, too, that if you aim center body from an elevated position, you're already too high. Looking down from above, you see part of the opposite side/top of the deer. Visually, then, the center of the mass that you see will be shoulder height or higher, when viewed from above. The higher the hunter, the worse this angle becomes. Regardless, focus on picking a spot lower on the deer, probably 1/3 the way up from the bottom. This doesn't leave very much to look at toward the bottom of the deer.
That's the reason I seldom go higher than 12 feet and shoot from a sitting position. To keep the angle down.