The incident is alleged to have happened near the Bed Warehouse, William Street Coach Park, in Scarborough between 8.15pm and 8.30pm on Friday 11 July.
It is alleged the suspect repeatedly asked the victim for money before putting a fist towards the victim in a threatening manner.
No injuries were caused, but the victim feared for his safety and believed he would have been subjected to violence had he not walked away from the scene.
Police are appealing for witnesses and any information about the suspect.
He is described as white, around 15 or 16 years old, over 6ft tall, of a thin build, with short blond hair. He was wearing a light blue t-shirt, black shorts, and he was carrying a black rucksack.
Anyone with information is asked to email zoe.todd@northyorkshire.police.uk to help our investigation.
Alternatively, you can call North Yorkshire Police on 101 and ask for Zoe Todd, or contact Crimestoppers anonymously on 0800 555 111 or via their website.
Please quote reference number 12250128005 when passing on information.
