There aren’t 75 5* guys, it’s usually 25-35 according to 247 composite
For 2018 there’s currently 25
2017 - 33
2016 - 25
2015 - 36
2014 - 33
2013 - 34
I think that’s going back far enough to establish general range. If you switch it to 247 only rankings (and 247 is easily the best rating service out there), the numbers are roughly the same, so more than 1-2 changes in the number of 5* guys. Now there is some volatility in who is ranked as a 5*, so maybe he mean that between 247, scout, rivals, and ESPN, around 75 guys can call themselves 5* recruits. But if you put stock in substandard recruiting rankings, that’s your own damn fault.