CREATE TABLE table_name_68 (time VARCHAR2, swimmer VARCHAR2, overall_rank VARCHAR2)

Tell me the total number of time for luke hall overall rank being larger than 105
SELECT COUNT(time) FROM table_name_68 WHERE swimmer = "luke hall" AND overall_rank > 105
SELECT COUNT("time") FROM "table_name_68" WHERE "luke hall" = "swimmer" AND "overall_rank" > 105