CREATE TABLE table_name_69 (tries_for NUMBER, points_diff VARCHAR2, points_against VARCHAR2, tries_against VARCHAR2)

Which Tries for has Points against larger than 87, and Tries against smaller than 28, and Points diff of +63?
SELECT AVG(tries_for) FROM table_name_69 WHERE points_against > 87 AND tries_against < 28 AND points_diff = "+63"
SELECT AVG("tries_for") FROM "table_name_69" WHERE "+63" = "points_diff" AND "points_against" > 87 AND "tries_against" < 28