Well if you look up 1.33 on the standard normal dist, +/- 1.33 std devs in my book says 0.8165. So (1-0.8165)/2 = ~9.2%. You divide by 2 since it is two-tailed.

In books you usually get 4 numbers:

all area up to +1.33: 0.9082

area beyond +1.33: 0.0918

area from 0 to +1.33: 0.4082

area +/- 1.33: 0.8165

You can see how any of them can get you the right area.