CREATE TABLE table_63396 ("Constituency number" TEXT, "Name" TEXT, "Reserved for  (  SC / ST /None ) " TEXT, "District" TEXT, "Number of electorates  ( 2009 ) " FLOAT)

Who has a constituency of 84?
SELECT "Name" FROM table_63396 WHERE "Constituency number" = '84'
SELECT "Name" FROM "table_63396" WHERE "Constituency number" = '84'