According to the Draft Express database of NBA players and prospects who have submitted to "without shoes", wingspan, and standing reach measurements, there were a total of 486 whose without shoe height were within one inch of Blake's height (6' 7.5" to 6' 9.5") . Blake is 6' 8.5". Of those 486 players, 356 had a longer wingspan. In other words, of other players with Blake's approximate height, over 73% have longer arms - roughly 3 out of every 4 players.
As to standing reach, over 82% of the players with a comparable height to Blake had a higher standing reach - roughly four out of five.
Keep working on those jump shots and post moves, Blake!