/tp command teleports the player with the coordinates offset

I was using a command block to teleport player to a different place if they are in a certain block(Command: "tp @a[x=-264, y=56, z=-75, r=0] ~ ~5 ~"). I noticed that the command did not activate when I went to the coordinates.
I used /tp to check the coordinates and the command didn't teleport me to the coordinates that I put in. It's hard to explain but a simple test can show this is true.