Answer
P(x < 84) = 0.8944
Work Step by Step
To find P( $x < 84$) :
1) Convert $84$ to a z score:
z = $\frac{x - \mu}{\sigma}$
z = $\frac{84 - 74}{8}$
z = 1.25
2) Find P( z < 1.25) = 0.8944
Therefore, P(x < 84) = 0.8944
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