1. The problem is to round the number 84.74 to the nearest whole number. 2. The rule for rounding to the nearest whole number is: if the decimal part is 0.5 or greater, round up; if it is less than 0.5, round down. 3. Here, the decimal part of 84.74 is 0.74, which is greater than 0.5. 4. Therefore, we round 84.74 up to 85. 5. The final answer is 85.