Only show “account” in menu when visitor is in the shop?

Wondering if there is a way to make it so that “Account” is only in the menu when the visitor is in the shop for this website I’m working on for a friend. He wants it only there when the user is in the shop pages if possible as the main purpose of the website is not for the shop and mostly doesn’t require users to be registered.

The page I need help with: [log in to see the link]