Teleporting relative to an entity

I've currently got a system for teleporting players to a position if they're close to a structure with an armor stand in the middle and also placing the same structure at the teleported position, but right now it just teleports the player to a specific block. Is it possible to get the offset between the armor stand and the player and teleport them to the new position with the same offset? As in, you stand 2 blocks to the left of the armor stand, and when you teleport you're still 2 blocks to the left of the armor stand, but in the new position.