If X Is Normally Distributed with Mean 12 and Standard $\le$

Multiple Choice

If x is normally distributed with mean 12 and standard deviation 2,then P(x $\le$ 9) is

A) P(z $\le$ 9/10) .
B) P(z $\le$ -3/2)
C) P(z $\le$ 2/3)
D) P(z $\le$ -3/4)