According to research, the typical TikTok user spends 316 hours per year using the app. Hitesh Makhija is a big TikTok fan, and he uses the app whenever he has some free time. Assume the number of hours spent in TikTok follows a normal probability distribution with a standard deviation of 11.5 hours. If Hitesh is in the top 3% in terms of time spent on TikTok, how many hours did he spend in TikTok last year? [5 Marks]