It happened at the shop on Newborough at around 3.45pm on Tuesday January 7 2020, and involved a woman in a wheelchair and a man, at the cash desk.
Officers are requesting the public’s assistance to help establish the full circumstances surrounding the incident.
In particular, they are appealing for the man involved in this incident to come forward to the police.
Anyone with information that could assist the investigation should contact North Yorkshire Police on 101
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
Quote the North Yorkshire Police reference number 12200003820.