Maria, at Customers Are Always, has a very good short video from YouTube that all managers and owners need to watch.
I hate to admit it, but in my early days in retail, I was guilty of the same transgression this employee committed. My boss would tell me to inventory the merchandise which required accuracy and attention to detail. Once I began focusing on the task, customers became an interruption and yes, an obstacle to performing my task.
Employees need to be continually reminded that the customer, not inventory, display building, or restocking, is their number one priority. This is especially true for new or seasonal workers.
You’ll notice the customer left without buying anything. Remember, it’s the customer’s needs that are paramount, not the employee’s task.