The correct answer is: $7\text{ years}$
Explanation
There are 12 months in one year, so divide the total months by 12 to get years.
Steps:
- Know the conversion: $$12\text{ months}=1\text{ year}$$
- Divide months by 12: $$84\div12=7$$
- Write the result with units: $$84\text{ months}=7\text{ years}$$
Therefore, 84 months equals 7 years.