I am unsure if what you want is the sprite to follow a path drawn by your finger, just following your finger or mimic a behavior where the sprite is "pinned" to the touch so it moves with your finger.
To have it where you touch a place and the sprite moves towards it. Add the Pathfinding behavior to the sprite then use an action
"On Touch" > "Find Path X: Touch.X - Y: Touch.Y"
"On Path Found" > "Move Along the Path"
To have it where the sprite moves all the time with your touch:
"On Touch" > "Set Position X: Touch.X - Y: Touch.Y"
Hope that helps.