The tenths place is directly after the decimal. Here, it is eight. To determine whether you should round up (to 9) or down (stay at 8), look to the number to the right of the tenths place. If it greater than or equal to 5, you should round up. If it less than 5, round down. 5 is equal to 5 so you should round up.
8.85 rounded to the nearest tenth is 8.9.
Hope this helps!!