Milk Demand ​ a Supermarket Has Determined That Daily Demand

Short Answer

Milk Demand ​ A supermarket has determined that daily demand for milk containers has an approximate bell shaped distribution,with a mean of 55 containers and a standard deviation of six containers. ​ ​
-{Milk Demand Narrative} If the supermarket begins each morning with a supply of 67 containers of milk,how often will demand exceed the supply? (Give a percentage.)