CREATE TABLE table_40179 ("Name" TEXT, "Pos." TEXT, "Height" TEXT, "Weight" FLOAT, "Year" TEXT, "Hometown  ( Previous school ) " TEXT)

What is the average Weight of the person who is 6'9'?
SELECT AVG("Weight") FROM table_40179 WHERE "Height" = '6''9'
SELECT AVG("Weight") FROM "table_40179" WHERE "Height" = '6\'9'