Yes, you can use a 85W charger.

Power Adapter/ cord wattage

General information

“Power adapters for Apple notebooks are available in 45W, 60W, and 85W varieties. You should use the appropriate wattage power adapter for your Apple notebook. You can use a higher wattage adapter without issue, but doing this won't make your computer charge faster or operate any differently. Lower wattage adapters will not provide enough power.”

https://support.apple.com/en-us/HT201700

Best.

Just make certain that the connections are compatible.  Magsafe2 is nit the same as Magsafe.

Ciao.