CREATE TABLE table_name_77 (result VARCHAR, first_elected VARCHAR, incumbent VARCHAR)

What was the result for incumbent Joseph McKenna who was first elected in 1884?
SELECT result FROM table_name_77 WHERE first_elected = "1884" AND incumbent = "joseph mckenna"
SELECT "result" FROM "table_name_77" WHERE "1884" = "first_elected" AND "incumbent" = "joseph mckenna"