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_name_55 (decile VARCHAR, roll VARCHAR, area VARCHAR, name VARCHAR)

### Question ###
What was the decile of Samuel Marsden Collegiate School in Whitby, when it had a roll higher than 163?

### Accurate SQL ###

SELECT COUNT(decile) FROM table_name_55 WHERE area = "whitby" AND name = "samuel marsden collegiate school" AND roll > 163