Answer :
[tex]\begin{gathered} \mu=8 \\ \sigma=0.5 \end{gathered}[/tex][tex]\begin{gathered} P(Z<\frac{X-\mu}{\sigma}) \\ P(Z<\frac{8.8-8}{0.5}) \\ P(Z<1.6) \end{gathered}[/tex]
Using the z-table:
[tex]P(X<8.8)\approx0.9452[/tex]