Z-score = (x-mean) / SD

mean=100  SD=10    Do this group in your head.
             x=100  z=________
x=90  z=________               x=110  z=________
x=80  z=________               x=120  z=________
x=70  z=________               x=130  z=________

x=95  z=________               x=105  z=________
x=85  z=________               x=115  z=________
x=75  z=________               x=125  z=________



mean=127  SD=12    Do this group by hand/head.
             x=127  z=________
x=115  z=________               x=139  z=________
x=103  z=________               x=151  z=________
x=91   z=________               x=163  z=________

Or use the SW: 	x-->Z-score-->CDF ***
x=121 z=________               x=133  z=________
x=109 z=________               x=145  z=________
x=97  z=________               x=157  z=________