Superstore data: high workload

The company you work for has noticed that when too many items are shipped per order using same day delivery, order picking can't follow the workload. Your data science colleagues have determined in the past that when the total shipped item quantity exceeds 4 standard deviations from the average amount of shipped items, the workload for order picking is too high. Create a viz that allows you to display when and how often this has happened in the past four years.