Then remove the restriction of 75% and recalculate. Your numbers are now not only incomplete with respect to the type of data they capture, they are incomplete, for these stats and therefore inaccurate. I can't believe how much time has been wasted on bunk.
Nothing IMO to suggest different conclusions from those in the OP, from what I can see:
Pressure % Sack % To Throw To Attempt To Sack To Scramble
Peyton Manning 18.4 11.1 2.35 2.33 3.42
Philip Rivers 27.7 15.4 2.45 2.35 3.8 6.2
Cam Newton 39 23.2 2.97 2.68 4.64 5.37
Matt Ryan 41.7 9.5 2.54 2.49 3.67 3.7
Robert Griffin III 34.5 12.5 2.83 2.62 4.34 5.05
Chad Henne 36.5 14.8 2.52 2.41 3.91 4.7
Ben Roethlisberger 37.6 22.5 2.66 2.47 4.24 4.77
Tony Romo 29.8 20 2.68 2.56 4.12 4.53
Aaron Rodgers 29 23.3 2.58 2.38 3.71 5.28
Drew Brees 29.6 18.4 2.73 2.62 3.75 4.58
Matthew Stafford 27.4 13 2.3 2.21 3.53 4.98
Matt Schaub 42.2 14.3 2.74 2.68 3.61 4.4
Andrew Luck 41 14.6 2.88 2.6 4.16 4.82
Jay Cutler 39 9.8 2.73 2.6 3.64 4.57
Terrelle Pryor 44.6 24.4 3.36 2.94 4.59 5.25
E.J. Manuel 38.3 17.9 2.89 2.57 4.36 5.28
Ryan Tannehill 33.8 33.8 2.48 2.28 3.6 4.3
Carson Palmer 41.9 16.5 2.52 2.41 3.6 5.4
Andy Dalton 26.1 22.2 2.53 2.31 4.03 4.83
Brandon Weeden 43.4 23.7 3.07 2.86 4.29 5.35
Eli Manning 41.1 15.7 2.79 2.7 3.81 4.1
Tom Brady 32.3 19.3 2.55 2.45 3.72 4.63
Russell Wilson 46.6 18.2 3.21 2.82 4.05 5.12
Joe Flacco 39.7 18.6 2.76 2.62 4.18 5.17
Geno Smith 41.5 22.6 3.17 2.85 4.55 5.52
Alex D. Smith 34.7 16.7 2.97 2.63 3.85 5.06
Sam Bradford 37.1 14 2.71 2.63 3.33 4.45
Colin Kaepernick 37.2 15.5 3.14 2.78 4.37 5.21
Michael Vick 45.6 16.4 3.4 3.06 4.58 5.32
MEAN 36.46 17.86 2.78 2.58 3.98 4.93
SD 6.70 5.22 0.29 0.21 0.38 0.51
TANNEHILL Z-SCORE 0.40 -3.06 1.02 1.46 1.00 1.23
CORR PRESURE % 0.06 0.70 0.73 0.45 -0.02
COR SACK % 0.06 0.18 0.04 0.33 0.18