Table schema:
CREATE TABLE table_name_1 (gross_debt_in_ INTEGER, debt_held_by_public__$billions_ VARCHAR, end_of_fiscal_year VARCHAR, as__percentage_of_gdp_low_high VARCHAR)

Question: For End of Fiscal Years past 1980 that also have as % of GDP Low-High of 83.4-84.4, and a Debt Held By Public ($Billions) smaller than 7,552 what would be the average Gross Debt in $Billions undeflated Treas. in said years?
SQL: SELECT AVG(gross_debt_in_) AS $billions_undeflated_treas FROM table_name_1 WHERE end_of_fiscal_year > 1980 AND as__percentage_of_gdp_low_high = "83.4-84.4" AND debt_held_by_public__$billions_ < 7 OFFSET 552