The Stone Sofa

One day Jon was on his ship sailing the sea, he was sailing north and he looked south and saw an old sofa and a cave behind it, he saw a giant cat jump on and suddenly the cat froze into stone! He went over there to collect the gold from the cave but he couldn't get through because the Sofa was in-front of it, and if he moves it he will turn into stone. He got on his ship and found some rope, he pulled and pulled and it moved 1 cm. Did he move the sofa or not?