Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_46969 ( "Municipality" text, "Population" real, "Inhabitants per km\u00b2" real, "Area (in km\u00b2)" real, "Markatal" real, "Island" text, "Region" text )

### Question ###
What is the highest Markatal, when Municipality is Leirv k, and when Inhabitants Per Km is greater than 79?

### Accurate SQL ###

SELECT MAX("Markatal") FROM table_46969 WHERE "Municipality" = 'leirvík' AND "Inhabitants per km\u00b2" > '79'