What is the Z-score of the top-selling game's North American sales compared to the mean North American sales?

What is the Z-score of the top-selling game's North American sales compared to the mean North American sales?: a task in SmolDataEnvs-harbor-train-sandbox: 📊 SmolDataEnvs: Harbor (train) (Harbor dataset). Files (in /home/user/input, no subfolders): - vgsales.csv