Answer
$0.4837$
Work Step by Step
$\text{z-score}=\frac{\text{data item-mean}}{\text{standard deviation}}$
Hence here the z-score is: $\frac{91-95}{7}\approx-0.6,\frac{100-95}{7}\approx0.7$
Then, using the table: $P(91\leq x\leq 100)=P(-0.6\leq z\leq 0.7)=P(z\leq0.7)-P(z\leq-0.6)\approx0.7580-0.2743=0.4837$
