what quote from stave 5 shows that scrooge is changed?

“I don’t know what to do!” cried Scrooge, laughing and crying in the same breath; and making a perfect Laocoön of himself with his stockings. “I am as light as a feather, I am as happy as an angel, I am as merry as a schoolboy. I am as giddy as a drunken man. A merry Christmas to everybody! A happy New Year to all the world. Hallo here! Whoop! Hallo!” stave 5