Feeling the stress of apartment-hunting?  Here's your solution.  This large 1 bedroom, Art Deco period apartment looks right through the green arbor that lines 84th Street, letting in plenty of sun and view but shading the large windows slightly.  The 10 x 12' dining area connects to the huge step-down living room, creating a sweeping space with full-wall windows facing south.  The kitchen and bathroom have been renovated, and you can move right in.  The bedroom has windows on two walls, including a wrap-around corner window that almost fills the south wall.   This apartment is full of light all day long.  And as a bonus, it comes with its own storage space in the basement.  The handsome 76 unit, full-service building has been a co-op since 1984.   The door staff is pleasant and helpful, and there is a live-in super.  The building's amenities include a bike room and laundry facilities. It's the perfect West Side location, with Central Park literally only steps away, shops and many choices for transportation nearby, the Museum of Natural History, the Children's Museum and Broadway, with all of its shops and restaurants.   15 West 84th Street is a non-smoking building and will allow sublets for two years within a 5 year period after a one-year period of ownership.