CREATE TABLE table_68922 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Points" FLOAT)

Name the sum of points for chassis of brm p160e and year more than 1974
SELECT SUM("Points") FROM table_68922 WHERE "Chassis" = 'brm p160e' AND "Year" > '1974'
SELECT SUM("Points") FROM "table_68922" WHERE "Chassis" = 'brm p160e' AND "Year" > '1974'