instruction: What is the highest Area (KM 2) for the Province of Ontario, that has the Status of Town, a Municipality of Minto, and a Rank that's smaller than 84?
response: SELECT MAX("Area (km 2 )") FROM table_75661 WHERE "Province" = 'ontario' AND "Status" = 'town' AND "Municipality" = 'minto' AND "Rank" < '84'