If I get it right, you mean:
If I drag the mouse up, the sprite goes down
If I drag left, the sprite goes right
Etc..
I would say :
On any left Click :
Set a variable named OriginalmouseX to Mouse.X; Set a variable named OriginalmouseY to Mouse.Y
Set a variable named OriginalSpriteX to Sprite.X; Set a variable named OriginalSpriteY to Sprite.Y
left click is down :
Set Sprite position to:
X : OriginalSpriteX - (-OriginalmouseX+Mouse.X)
Y : OriginalSpriteY - (-OriginalmouseY+Mouse.Y)
I think this will work (if the sprite go to the same direction as the mouse, just change the - to a +, sometimes I make error with signs)