Radio Shack has been at Dutch Square since the mall opened, though not always in this location. I'm a bit hazy on the old layout, but think the original site was a bit further up the hill towards Tapp's. At any rate, as reported by commenter Andrew some time ago, they have now relocated this store from Dutch Square to the new Wal-Mart plaza, Bush River Village.
I believe this pull-out leaves The Rogue hair stylist as the only store which has been in the mall from the beginning.
(Hat tip to commenter Andrew)