CREATE TABLE table_name_78 (Id VARCHAR)

What is the highest value for 2000, when the value for 1950 is 3.5, and when the value for 1970 is greater than 3.4?
SELECT MAX(2000) FROM table_name_78 WHERE 1950 = 3.5 AND 1970 > 3.4
SELECT MAX(2000) FROM "table_name_78" WHERE FALSE