$.$ A restaurant uses the continuous$-$review inventory model to replenish its

inventory of potatoes. The demand during the lead time is Normally

distributed with an average of $50$ lbs and a standard deviation of $10.$

What should be the reorder point to ensure that the no stockout probability

of $95\%?$

A$)0$

B$)50$

C$)66\mathrm{.}45$

D$)$ None of the above