CREATE TABLE table_20981 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Falcons points" FLOAT, "Opponents" FLOAT, "Record" TEXT, "Attendance" FLOAT)

How many opponents were there for the game recorded as 6-4 in the Atlanta Falcons 1978 season?
SELECT COUNT("Opponents") FROM table_20981 WHERE "Record" = '6-4'
SELECT COUNT("Opponents") FROM "table_20981" WHERE "Record" = '6-4'