Answer
$0.0000$
Work Step by Step
$\text{z-score}=\frac{\text{data item-mean}}{\text{standard deviation}}$
Hence here the z-score is: $\frac{50-95}{7}\approx-0.6,\frac{100-95}{7}\approx0.7$
Then, using the table: $P(x\leq 50)=P(z\leq -6.4)=0.0000$
