CREATE TABLE table_75768 ("County" TEXT, "Population  ( 2011 ) " FLOAT, "Population  ( 2006 ) " FLOAT, "Change  ( % ) " FLOAT, "Area  ( km\\u00b2 ) " FLOAT, "Population density" FLOAT)

What is the Population density that has a Change (%) higher than 10.4, and a Population (2011) less than 8574, in the County of Queens?
SELECT AVG("Population density") FROM table_75768 WHERE "Change (%)" > '10.4' AND "County" = 'queens' AND "Population (2011)" < '8574'
SELECT AVG("Population density") FROM "table_75768" WHERE "Change (%)" > '10.4' AND "County" = 'queens' AND "Population (2011)" < '8574'