Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_69 (markatal INTEGER, municipality VARCHAR, inhabitants_per_km² VARCHAR)
### Question:
What is the highest Markatal, when Municipality is Leirvík, and when Inhabitants Per Km² is greater than 79?
### Answer:
SELECT MAX(markatal) FROM table_name_69 WHERE municipality = "leirvík" AND inhabitants_per_km² > 79